<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Clicking on the html element itself fires a click event</title>
    <link rel="author" title="Chris Rebert" href="http://chrisrebert.com">
    <link rel="help" href="https://w3c.github.io/uievents/#event-type-click">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <script src="/resources/testdriver.js"></script>
    <script src="/resources/testdriver-actions.js"></script>
    <script src="/resources/testdriver-vendor.js"></script>
    <style>
html {
  background-color: blue;
  margin: 0;
}
body {
  background-color: red;
  height: 0;
  margin: 0;
}
#guineapig {
  background-color: white;
  padding-top: 50px;/* Text is easier to see when it's not at the exact top of the viewport */
  margin-top: 0;/* Ensure there's no exposed html element above this */
  margin-bottom: 100px;/* Expose an area of the html element itself */
}
#other {
  background-color: white;
  height: 100vh;/* Push the rest of the html element outside of the viewport */
}
    </style>
  </head>
  <body>
    <p id="guineapig">Click on the blue area below.</p>
    <p id="other">&nbsp;</p><!-- Needed to prevent the margin from collapsing -->
    <script>
setup({explicit_timeout: true});
promise_test(async function(t) {
  document.documentElement.addEventListener('click', function (event) {
    t.step(function () {
      assert_equals(event.target, document.documentElement, 'target of click event must be the html element');
      assert_equals(event.eventPhase, Event.AT_TARGET, 'click event must propagate to the html element at the Target Phase');
      var passed = event.target === document.documentElement && event.eventPhase === Event.AT_TARGET;
      document.documentElement.style.backgroundColor = 'white';
      document.getElementById('other').style.height = 'auto';
      var guineapig = document.getElementById('guineapig');
      guineapig.style.marginBottom = '16px';
      if (passed) {
        guineapig.textContent = 'PASS';
        guineapig.style.backgroundColor = 'green';
      }
      t.done();
    });
  }, false);

  const xPositionInHtml = yPositionInHtml = 150;
  await new test_driver.Actions()
    .pointerMove(xPositionInHtml, yPositionInHtml)
    .pointerDown()
    .pointerUp()
    .send();
}, "Clicking on the html element itself should fire a click event targeted at the html element");
    </script>
  </body>
</html>
